class Pizza:
    def __init__(self, builder):
        self.garlic = builder.garlic
        self.extra_cheese = builder.extra_cheese

    def __str__(self):
        garlic = "yes" if self.garlic else "no"
        cheese = "yes" if self.extra_cheese else "no"
        info = ("Garlic: {}".format(garlic), "Extra cheese: {}".format(cheese))
        return "\n".join(info)

    class PizzaBuilder:
        def __init__(self):
            self.extra_cheese = False
            self.garlic = False

        def add_garlic(self):
            self.garlic = True
            return self

        def add_extra_cheese(self):
            self.extra_cheese = True
            return self

        def build(self):
            return Pizza(self)


if __name__ == "__main__":
    pizza = Pizza.PizzaBuilder().add_garlic().add_extra_cheese().build()
    print(pizza)
